Suikoden Demon Century

Ten Years ago, Genichirou Izayoi died trying to stop the sorcerer Rebi Ra, and as a result Shinjuku became a playground for demons. And now, the day approaches when Rebi Ra will complete his decade-long ritual to plunge the rest of the world into chaos! As Genichirou's son, it falls to Kyouya to venture into the heart of Shinjuku and put an end to the sorcerer his father couldn't beat. Can Kyouya exceed his father's legacy, or will the demons of Shinjuku create Hell on Earth?

Once upon a time, there was a certain family having strong influence on the rule of the Imperial Court. They had their own might called "Kidou" and yet got hated because of the might itself. At last, the patriarch of the family was entrapped to his death, and all the family was doomed to ruin... The present day — the survived descendants of this family, now calling themselves "Kidousyuu" schemed to resurrect their murdered patriarch once again, and the ferocious evil spell went into action.

In the year 1580, a man named Lord Nobunaga Oda sends hoards of unholy armies across Japan, slaying all who stand in their way. A young ninja escapes her villages' destruction with a short sword, one of the three mystical weapons that can end Oda's rule. During her quest, she is joined by two other ninjas who wield the other two weapons of legend, the sacred sword and spear.

A resident of the Floating Castle that battle demon beings, the girl Rasutel (Rasu), chosen by the willful lady, the Demon-Breaker sword, is sent on a quest to save a princess kidnapped by a Youki. Her quest is helped by a mysterious Youki called Anshu (but he has basic color that usual Youkis do not have.... hehe!). She is also hampered in her quest by her demon-being oriented younger brother who seeks her golden eyes, the heritage of their father, the Golden Youshu.